recently i've had problems getting my car into second gear and it's only second gear that gives me any problems. when I'm coming out of first and try to throw it in second it just won't go sometimes,there is no grinding at all. but when I try to put it in second and it doesn't go, if I let off the clutch and pump it once more it will go into second with ease. it's almost like my clutch is not working the first time I push it in. again there's no grinding at all it just simply won't go into second unless i pump the clutch again. what is this??

1997 Trans Am-mods- stage 2 clutch,cold air intake,full exhaust,flywheel etc..